i think i already mentioned that even though jaguar land rover want them to be reset, there are 1000's replaced that never were reset.

 

Good talk

 

The infamous engine voltage low appeared .Start engine . seeing how the battery was seven years old I went down and got a new interstate. I had a battery buddy. And proceeded to start the car. Everything was swell for several days then it went downhill. I believe I was running straight battery power without the alternator charging I replaced the battery with a brand new battery and I'm going to the Jack dealer to have it interface the new battery with. The cars software system. Hopefully that will take care of the problem. If not, I am going to replace the alternator. Wish me luck.

 

I still don't understand why I could not put jumper cables from another battery to car ground and hot to car positive battery cable to maintain memory while I install another battery. 🤔🤔

 

As private person you propably can ... .BUT: Thre are a risk of shorting the loose Plus terminal to the chassis during change. That will for sure give big ark and can result burn wounds and possible electrical failures on cables and modules of the vehicle. Insurance company might deny any claims on this case.
I never been afraid to remove battery from any vehicle. There are some models where manufacturer give instructions for the proper remove procedure of the battery to make sure all systems are shut down and ready for complete power cut. (typically PSA vehicles from MY2000 onwards )
There are no prosedure given for x351, so removing battery from x351 should not have any problems.

 

"Thre are a risk of shorting the loose Plus terminal to the chassis during change"

Oh i would wrap it carefully with an old sock like I've done many times before on various vehicles but thanks

 

Thats one way to do it. Cabletie the sock on, so it dosent slip away.
Years ago i bought an plastic box what are made for the live terminal protection. It locks around the battery terminal securing it for shorting. Been used it once or twice for MY2000-> PSA vehicles what are known to have risks with battery removal.
However: Modern vehicles mostly have main settings stored on non-volative memory anyway, so typically only settings to lose are date/time and one touch windows limits.

 

Just wanted to add my two cents in this conversation as there seems to be a ton of different information online and most of the talk surrounds older model XJ’s. After reading all the talk about needing to reset stuff and what not, I decided rather than pay those idiots at the dealership the $641 they wanted to change my battery, I’d chance it on my own and go to an independent shop if a reset or something was apparent afterward.

I bought a Duralast Platinum AGM 900CCA replacement at AutoZone for $275 out the door after being the old one back for recycling.
I locked the car and waited a good ten minutes for everything to power down, as was suggested. Unlocked the trunk only with the remote.
Pulled the negative, pulled the positive, replaced the battery, reconnected the positive then the negative (stopped the alarm).
Rolled all the windows down and back up again holding for 5 seconds at each end, and wallah, literally nothing else needed to be reset, all the previous setting had been saved and the stop start feature is working again for the first time in years.
The old battery was the original, 7+ years old, but for the most part working just fine (occasional harder start and no stop start functionality). This model year does not appear to have that elusive Auxiliary battery that is mentioned so often, I searched everywhere and have found no sign of it.
Hope that helps someone else out that is in my situation.

 

Right in 2016 Jaguar went to a super cap instead of the separate second small battery like the original system had.
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Great information and thread - thank you all. Sounds complicated and probably a good thing I read on here before changing battery !

 

I recently disconnected my ‘15 XKR battery to have it tested, after install…I had the do the windo program thin g, and i5 lost the seat memory. That’s all.

 

How does one reset the battery module, parking brake, clock and windows? My selling, non-Jaguar dealer is probably going to disconnect the battery before removing an after-market vehicle tracking device tomorrow. I don't want to get it back without having these things reset.

 

Fixed Dang spelling…and an add.

BTW. Why do cars built in the 21st century nit have non volatile memory for settings?

 

In fact they do. A lot of stuff are actually stored on non volative memory exsample on x351 system what do not reset even with full vehicle reset command made by diag tool.
Only very minor part of vehicle settings are reset by removing battery and system are made so in purpose, so user can reset simple things without owning diag tools.
Esample aircon flap position calibration do need four full calibration runs by diag tool before flap endpoints are reseted and reinitialised. (just one exsample, there are much more...)

 

Blepore35, I have a 2014 XJ and battery replacement was simple. Local battery warehouse disconnected old battery and put in the new AGM with spec CCA. I reset window 1 touch, degree C to F, clock & date and that was it. You can drive the car immediately and do those minor resets at your leisure.